Gas-burner.



PATENTED MAYM; 1907.

s. STEWART. GAS BURNER. APPLIOATIOH FILED MAR. 24, 1905. RENEWED MAR. 22, 1907.

' M m V6 14 fol. W J

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'ments in Gas-Burners, fully describe represented in-the following specification,

and the accompanyingdrawings, forming To all whom it mayconccrn: Be it known that I, SAMUEL STEWART, a citizen of the United States, whose residence is 151 Sherman-avenue, Newark,"county of Essex, and State of New Jersey, have invented certain new and useful Im roveand part of the same. p The 'present invention relates to a burner which is adapted for use in gas stoves of various kinds, 'andinay-be used effectively in gas ranges andin stoves for'heatingordi- Heretofore, such burners have been left open nary-apartments. Y The invention is especially applicable to a certain cheap formof heating gas-burner consisting of a plain cylindrical shell with a perforated flame-screen at the to and a'gas supply pipe extended across 1; e bottom.

at. the bottom and liable to the intrusion of dirt and lint and to the disturbance produced by sudden drafts of air, and the invention consists in a cylindrical strainer made separate from the burner shell and telescopically connected therewith, and operating to wholly close'the bottom of the burner so as to'prevent the access of drafts and lint. In burners of this class, the flame-screen has hereto fore been flanged over upon the to of the shell, orv has been'fitted' tightly within an encircling collar; either of which constructions prevents its free expansion and causes such movements as to crack the perforated metal.

The present invention includes aparticular means of sup orting the edge of the flame screen movably etween two flat flanges, so

' as to permit free e ansion and contraction.-

The invention wil be understood by reference to the annexed drawing in which and its gas supply pipe with a section of a Figure 1 is avertical section of the burner for supporting cookin utensils. Fig. 2 1s a side elevation of the s ell; Fig. 3 aside elevation of the strainer; and Fig. a plan of the burner. -a desi nates the cylindricalshell having a narrow fl to support the flame screen a which is referably made of finely perforated s set "metal. A'collar d is shown fitted to the ex.-

terior ofthe shell at the upper end, and pro- Vided with flange e. overlapped upon the edge of the screen a to hold it upon the flange b,-

and the shell and collar are shown locked Specification of Letters katent. Application filed March 24,'190 5.'. {Renewed March 22', 1907. Serial filo-363355.

and such large area I obtain grid tending be ow the perforated bottom k'is applied ange b turned-inwardly at'the top together bythe double beadf, f, whichin' Patented May 14, 1907. H

practice isalformed simultaneously in the shell and collar by suitable beading tools 1 p after- .the

place.

Th e screen has heretofore been flanged to the shell or fitted snugly within a collar which does not screen when heated, and thus. causes' the screenand. collar are adjusted in permit any expansion of the .6 screen to buckle or split under 'repeatedf 5 heating'fand cooling. In the present construction, the screen ismade small enough to expand without interference-from the collar d,.*an d'i's thus capable'of'expanding and contracting-between the flanges b and e without any 1n ury. p

The clamping of the edge of the screen between the flanges b and 'e and the securing of the-collar by the bead f, f, prevents any" leakage of air at the margin of the screen,- which has been found in practice to be detrimefptal to the operation of the burner. bottom of the shell and is provided with a single jet aperture h, which discharges .gas' upwardly within the shell.- j 'The'strain'cr which is applied to the botgas pipe 9 is shown extended across the tomof the shell Wholly closes the same, butJ- furnishes the necessary supply of air thereto.

In this class of burner, I employ a volume of air about fiftytimes greater thanthe volume of gas which is admitted, and in order to "admit such a volume of air through a strainer,

a large area of the strainer surface is-required, by extending a cylindrical strainer downward from the shell I and furnishing the same with a perforated b'ottom'; The strainer has a perforated cylinder 7: having holes l at opposite sides to hang it upon the transverse it may be fitted snuly to either the lnner or outer side ofthe she 1. Such modeof fitti the strainer to the shell forms what is term a-telesco ic connection It is shown "ex gas pipe nearly half asfar w '93 a p peand as the shellextends upward therefrom, and a to the strainer and secured thereon by flan e m.

' To apply the shell readily to the gas pipe, and to remove the same at pleasure to-clean out its interior, or the-interior,- "if the strainer when necessary, the opposite sides of the shell are formed with slots straddle the gas pipe 9 and to thus rest -re-.

1 adapted to movably thereon. The telescopic connec- U tion between the shell and strainer makesa the interior of the parts.

; mission'of air. "of air from blowinginto the bottom of the shell, and thus renders the operation of the joint. to prevent the admission of air; while it readily permits the separation of the shell from the strainerwhen required, for cleaning It also permits the parts to be'made interchangeable and fitted together with the least possible labor, as no fastenings of any are required. 7

This construction is very cheap and simple; and furnishes a means of securing the strainer, the shell, and the gas pipe together, with M any fastening devices.

The entire construction is of a character "that permits all the-parts to be made by ordifnaryfltinsmit hs tools, and enables them to be assembled with the smallest amount of labor.

It will be observed that in the burner to which'thisinvention relates, the burner shell and its attachments may be wholly suspended upon the gas pipe g, so that the pipe may serve as the sole means of sustaining the gas; are therefore mingled within the shell 0 above the-gas pipe g. I have made a special ,claim to this arrangement of the Shell, the

gas pipe and thestrainer, as it is found very advantageous in practice.-

The extension of the strainer. downward from the bottom of the shell, and the formation of it with the perforated bottom k, gives a very large perforated area for the ad- The strainer prevents drafts burner more uniform.

In Fig; 1, a grating 0 is shown at a suitable distance above the burner to support a kettle:,-sauce-pan, or cooking utensil, the flame t ure h, as the'gas pipe is located at the junc-- "'t' njjof the shell and strainer, and the air and p being represented between the top of the burner and the grating. The burner may thus be arranged for use in cooking stoves and ranges, but when used in heating stoves it is commonly placed within a sheet metal cylinder, and the heat of the flame arranged to strike the top of the heater.

Having thus set forth the nature of the invention-what is claimed herein is:

1. In a gas burner-for heating purposes, the combination, with a horizontal gas pipe having a jet aperture in its upper side, of a burner shell supported thereon, and projected above the gas pipe and provided with flame-screen 0 upon the top, and a cylindrical strainer telescoping with the shell and )rojected below the as pipe, and closing the ottom of the shell to exclude wind and lint from the interior.

2. In a gas burner for heating purposes, the combination, with an imperforate burner shell a having flame-screen c at the top, and a perforated strainer k extended below the bottom of such shell, of the gas pipe inserted transversely through the shell and strainer at their junction and having the jet aperture it upon its upper side, whereby the air supply enters wholly below the gas supply and the air is mingled withthe gas in the shell.

3. In a gas burner for heating purposes, the combination, with the gas pipe g having perforation it upon its upper side, of the cylindrical perforated strainer 7c having the holes I fitted to the as pipe, the cylindrical shell (1 having the I ame-screen 0 upon the top and fitted telescopically at its lower endupon the strainer k, and provided with the slots n at opposite sides fitted removably over the gas pipe, as and for the purpose setforth. In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

' SAMUEL STEWART.

.Witnesses:

MILDRED F. MAR UARDT,

THOMAS S. CRANE. 

